NewMetadataFromDir parses a Dockerfile located within the provided directory and generates metadata based on the contents.

NewMetadataFromReader parses a Dockerfile reader generates metadata based on the contents.

ErrDockerfileMissingFROMorARG is returned the first directive of a Dockerfile isn't FROM or ARG.

ErrEmptyDockerfile is returned when a parsed Dockerfile has no nodes.

ErrInvalidBaseImage is returned when the base image referenced in the FROM directive is invalid.

ErrInvalidBuildContext is returned when there is a failure finding the location of the source files of an image.

ErrInvalidDockerfile is returned when a Dockerfile cannot be parsed.

ErrMissingDockerfile is returned when no Dockerfile was found.

Metadata represents a parsed Dockerfile.